Держи
2sin5x=0 /:2
sin5x=0
5x=pik /*1/5
x=pik/5, k∈Z
sin3x-sin2x=0
2sin(x/2)*cos(5x/2)=0
1) 2sin(x/2)=0
sin(x/2)=0
x/2=pik /*2
x=2pik, k∈Z
2) cos(5x/2)=0
5x/2=pi/2+pik /*2/5
x=pi/5+2pik/5, k∈Z
Держи
2sin5x=0 /:2
sin5x=0
5x=pik /*1/5
x=pik/5, k∈Z
sin3x-sin2x=0
2sin(x/2)*cos(5x/2)=0
1) 2sin(x/2)=0
sin(x/2)=0
x/2=pik /*2
x=2pik, k∈Z
2) cos(5x/2)=0
5x/2=pi/2+pik /*2/5
x=pi/5+2pik/5, k∈Z